Plaster lath



INVENTOR. @101712 E Makawlc ATTORNEY "Qwmm m u Saw KRY AEa

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.Md FPE June 8 1926.

' i JOHN I'. IAXOWSXI, Ol' STOCKTON, CALIFORNIA, ASSIGNOBT'IO CALIFORNIA CEDAR Panarea June 8,1926.

UNITED STATESv PATENT `orme-1a.

PRODUCTS COMPANY, OF STOCKTON, CALIFORNIA.

'rnasfran Ln'rn.

application mea nay as; 192s. serial np. 641:985.

This invention relates to the building art and particularly-to wall construtionf" I have conceived' as the 'present invention .a composition lathing mounted upona suitable supporting surface, there belng moulded into thetface of the composition a dove tail or other suitable shaped 'key structure.-

Plaster or stucco lath now commonly used as a substitute for wooden lath is too exl pensive both in first cost and in the methodl of application for ordinary use, and there can be no big demand therefor until a good lath which can successfully -compete with wooden lath, is produced.

The main object rof the invention thereforeis to produce a cheap but durable com- V position lath on which the plaster,.cem"ent or other plastic may be readily spread and bonded thereon.

' by theuse of the com osition andy K molding thereof as ully set forth herein'- I y calcined gy sum,'case1n as a water prootin 1 accomplish Athe "objects f the invention structural after.

The'ivgure on the drawing i`s` a perspective view of a fragmentary portion of' 'a sheetof my improved lath.

In carrying out the 4invention I make up i a composition preferably of.- casting plaster meal. This composition, is 's read to a thickness of about half an inc facing material.

percentage of sawdust on--a suitable Y supporting paper or board 2, and before it sets I mold or form-the outer face thereof y so as to produce dove-tailed or similar 'shaped grooves 3 extending thereacross, or a similar formation having lfront and rear faces, with intervening ope'ningsor interstices into which theplastic material to be applied t0 the lath may ow and" be locked thereto.

As .will be readily seen the composition may be. a very cheap product compared to wood. The mechanical keyl structure for the plastic material, moulded permanently in the composition, forms aperfect locking structure to hold the plastic, which function is augmented bythe fact that the elements of the composition'will be such as form a natural bond..for the plastic sur- Having thus describedmy Iinvention what I claim asnew and useful and desire to secure by Letters Patent isz' LA compositlon plaster lath containing calcined gypsuJnncasein as a water proofing element and dextrin. v

3. A composition plaster lath consisting .of calcined gypsum, casein as a water proofing element, sawdust and an, adhesive element. 7

In testimony whereof' I aiiix my signature. f f

7, JOHN MALKOWSKT.` 

